Polycom RMX 1500 Administrator's Manual page 783

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5
Make sure that the IP address of the RMX Signaling Host is the same one defined as a trusted host
in Office Communications Server 2007/Lync Server 2010.
Polycom, Inc.
The Default IP Service - Networking IP dialog box opens.
Make sure the IP Network Type is set to H.323 & SIP even though SIP will be the only
call setup used with Office Communications Server 2007.
Make sure that the correct parameters are defined for the Signaling Host IP Address,
Media Card 1 IP Address, Media Card 2 IP Address (RMX 2000/4000 if necessary), Media
Card 3 IP Address (RMX 4000 if necessary), Media Card 4 IP Address (RMX 4000 if
necessary) and Subnet Mask.
Appendix H-Setting the RMX for Integration Into Microsoft Environment
H-37